Process of cleaning millstones.



Y PATBNTED MAR. 22, 1904.

J. A. HBNKBL. PROCESS 01? CLEANING MILLSTONES..

APPLICATION FILED AUG. 3, 1903.

11o-'MODEL Witnesses Attorney I mi scams PErsns co., Pwoqumo., wAsnmmjom uA c.

Patented March 22, 1904.

PATENT OFFICE.

J EWETT A. HENKEL, BEDFORD CITY, VIRGINIA.

PROCESS OF CLEANING MILLSTONES.

SPECIFICATION forming part of Letters Patent N0. 755,132, dated IVIarch 22, 1904.

Application led August 3, 1903. Serial No. 168,084. (No specimens.)

To a/ZZ whom it may concer-1e:

Be it known that I, Jnwn'r'r A'rwooD HEN- KEL, a citizen of the United States," residing at Bedford City, in the county of Bedford and State of Virginia, haveinvented certain new and useful Improvements in Processes 0f Cleaning Millstones; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a new and useful process for cleaning millstones.

In the use of millstones in grinding-mills for crushing grain it is well known that the Working surface or face of the stones must be frequently cleaned; otherwise the mill will not grind the grain properly.

The object of my invention is to prevent the accumulation of indurate vegetable mat-` ter upon the face of a millstone; and my improved process consists in passing salt, together with the stock, between the working surfaces of the millstones while grinding the stock, as hereinafter described and claimed.

i The accompanying drawing is a diagrammatic sectional view of a pair of millstones employed in carrying out my improved process.

The mode of practicing my invention is as follows: In my process of cleaning the stones I set the mill in operation, adjust the stones for grinding, and then feed an abrasive material through the mill,together with the stock. The abrasive substance is preferably granular in form and of a non-deleterious character-such,`for instance, as common tablesalt. It is preferably fed between the stones, together with the grain that is being crushed, so that the operation of the mill need not be suspended while the cleaning is taking place, and the small amount of salt or other abrasive material of a harmless nature will not render thev product of the mill injurious and useless. I have found by experience that half of a pound of common Jne salt fed into the eye of the millstone, together with the ordinary feed of grain, will thoroughly clean and bring out the natural' grit of the stone in a very short period of time. The salt or other material used as it passes from the eye to the skirt of the stones will abrade and remove the gummed coating on the working faces and clean them in a thorough and eflicient manner. Y

In the drawing a pair of millstones are indicated at c b. The stock fed thereto and subjected to the attrition of their opposingy faces is conventionally indicated by dots at c, and the salt or other abrasive which is fedto them, together with the' stock, is indicated by the heavier dots 0l.

From the foregoing description it is believed that the mode of practicing and the advantagesof my invention will be readily understood, and it will also be understood that I do not limit myself to the use of salt, since various other substances may be used.

Having thus fully described my process,

lwhat I claim as my invention, and desire to secure by Letters Patent, is-

The herein described process of cleaning millstones, consisting in passing common Salt, together with the stock, between the working surfaces of the millstones, by the operation of the millstones while grinding the stock.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JEWET'I A. HENKEL.

Witnesses:

J M. PINKARD, D., R. HENsLEY. 

